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authorJakub Kicinski <jakub.kicinski@netronome.com>2019-11-27 23:16:39 +0300
committerDavid S. Miller <davem@davemloft.net>2019-11-29 09:40:29 +0300
commitc329ef9684de9517d82af5b4758c9e1b64a8a11a (patch)
treea4f623037c5505b26a1a70e01786352308b6a5cd /net
parent81b6b96475ac7a4ebfceae9f16fb3758327adbfe (diff)
downloadlinux-c329ef9684de9517d82af5b4758c9e1b64a8a11a.tar.xz
net/tls: take into account that bpf_exec_tx_verdict() may free the record
bpf_exec_tx_verdict() may free the record if tls_push_record() fails, or if the entire record got consumed by BPF. Re-check ctx->open_rec before touching the data. Fixes: d3b18ad31f93 ("tls: add bpf support to sk_msg handling") Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/tls/tls_sw.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index da9f9ce51e7b..70e3c0c1af50 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -984,7 +984,7 @@ alloc_encrypted:
num_async++;
else if (ret == -ENOMEM)
goto wait_for_memory;
- else if (ret == -ENOSPC)
+ else if (ctx->open_rec && ret == -ENOSPC)
goto rollback_iter;
else if (ret != -EAGAIN)
goto send_end;
@@ -1053,11 +1053,12 @@ wait_for_memory:
ret = sk_stream_wait_memory(sk, &timeo);
if (ret) {
trim_sgl:
- tls_trim_both_msgs(sk, orig_size);
+ if (ctx->open_rec)
+ tls_trim_both_msgs(sk, orig_size);
goto send_end;
}
- if (msg_en->sg.size < required_size)
+ if (ctx->open_rec && msg_en->sg.size < required_size)
goto alloc_encrypted;
}
@@ -1190,11 +1191,13 @@ wait_for_sndbuf:
wait_for_memory:
ret = sk_stream_wait_memory(sk, &timeo);
if (ret) {
- tls_trim_both_msgs(sk, msg_pl->sg.size);
+ if (ctx->open_rec)
+ tls_trim_both_msgs(sk, msg_pl->sg.size);
goto sendpage_end;
}
- goto alloc_payload;
+ if (ctx->open_rec)
+ goto alloc_payload;
}
if (num_async) {